Electro-magnetic reciprocating pump



(No Model.)

' G. J. VAN DE'POELE, D-eod.

C. A. COFFIN & A. WAHL, Administrators. ELECTROMAGNETIC REOIPROOATINGPUMP.

No. 496,331. Pa dApr.25,1893.

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UNITED STATES PATENT OFFICE,

CHARLES J. VAN DEPOELE, OF LYNN, MASSACHUSETTS; C. A. COFFIN AND ALBERTWAHL, ADMINISTRATORS OF SAID VAN DEPOELE, DECEASED, ASSIGNORS TO THETHOMSON-HOUSTON ELECTRIC COMPANY, OF BOS- TON, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 496,331, dated April25, 1893.

Application filed December 12, 1891- Serial No. 414,883; (No model.)

T0 at whom it may concern:

Be it known that I, CHARLES J. VAN DE- POELE, a citizen of the UnitedStates, residing at Lynn, in the county of Essex and State ofMassachusetts, have invented certain new and useful Improvements inElectro-Magnetic Reciprocating Pumps, of which the following is adescription, reference being had to the accompanying drawings, and tothe letters and figures of reference marked thereon.

My present invention relates to improvements in reciprocating pumpingapparatus actuated by electrical power.

Several patents have already been granted to me for electricallyactuated pumping apparatus, but the present invention is believed to beentirely novel in that the liquid to be moved is passed directly throughan electromagnetic engine in a manner differing from any heretoforedisclosed by me.

The reciprocating electro-magn'etic engine which forms the basis of mysaid invention comprises motor coils inclosed within a magnetic envelopeand provided with an interior non-magnetic metallic lining within whicha magnetic body or plunger is reciprooated under the influence ofcurrents which are caused to flow in the motor coils in any appropriatemanner. A pumping apparatus is secured to one end of the electric engineand a pump piston is fitted thereto and secured directly to the magneticplunger. The magnetic plunger far outweighs the pump piston so that itsmass may preponderatc to such an extent as to be capable of developingavery high pressure upon the pump piston it being understood that thepressure capable of being developed bya mass of iron is limited by thepoint of magnetic saturation thereof. The other end of the electricengine is provided with a delivery pipe and may also have an air chamberof the usual type. The magnetic plunger is either longitudinally slittedor made smaller than the tube within which it moves and in operationsaid plunger in its upward stroke raises water. In its downward strokethe water is forced out of the pump cylinder by the descent of thepiston and passes upward through passages formed in the pump proper saidpassages communicating with the central opening of the electric enginethrough which it passes upward either around the body of the piston,where it is made smaller, or throughordinary slots or ducts formedtherein, passing out through the valved pipe in the top of the engine.

With an ordinarydouble-acting pump, practically the same amount of poweris required to be exerted in each stroke, but by means of thearrangement I have now devised or its substantial equivalent, I amenabled to effect a very great economy in the application of electricpower since the pump must be placed within the range of lift, abouttwenty-eight feet from the liquid, which will be referred to as Water.The plunger being proportionately heavy, a considerable part of thepower of the motor coils will be absorbed in raising it, but on theother hand, having the smallest amount of work to perform, theadditional power required to raise the water twenty-eight feet into thepump barrel, will be comparatively small and easily performed. The pumpbeing now charged with water we have an extra heavy plunger in positionto exert the force of gravity thereon. The plunger is also of large masscapable of receiving the impression of avery strong magnetic field andthe motor coils being now free to exert their maximum power upon theplunger, aided by its own weight, are capable of developing a highpressure upon the pump piston and of thereby forcing the water to a verygreat height. The water passing up through the pump under the influenceof the'descending piston,avoids the introduction of any additionalpiping and also keeps the motor coils cool under all circumstances andpermits the use of much heavier currents in said motor coils than wouldotherwise be possible, thereby, by preventing overheating, adding verygreatly to the possible capacity and general efficiency of the machine.

The construction and arrangement of the Figure 1 is a verticallongitudinal section of a reciprocating electro-magnetic pumping engineembodying the invention. Fig. 2 is a transverse sectional view of theplunger. Fig. 3 is a transverse sectional view on the line 3-3 of Fig.1.

A, is a magnetic envelope Within which are placed the motor coils B,13', and O, the coils l3, B, being at the extremities of the coil C. Aninterior non-magnetic lining is provided for the motor coils withinwhich lining is adapted to be reciprocated the plunger E. The upper partof the cylinder A, is closed by an iron head F, which is provided with avalved opening f, upon which is fitted an ed uction pipe Gr, and whichis, or maybe, provided with an air chamber H. The lower portion of thecylinder A, is provided with an iron head I, to which is attached ametallic, preferably iron, extension J, which constitutes the pumpproper and is provided at its lower end with a tubular extension j,carrying the foot valve K.

The pump J, may be constructed in a variety of Ways without in any wayatIecting this invention so long as the movement of the water issubstantially in accordance herewith. In the present instance I haveshown a construction in which a central pump cylinder I1, is surroundedby four eduction ports 1, 2, 3, i, as indicated in Fig. 3, each of saidports being provided, as here indicated, at its upper end, with a valve,said valves being in small chambers each opening into the lower end ofthe tube D, of the electric engine.

To the lower end of the plunger E, is secured the pump piston P, whichsaid piston is fitted to move Within the pump cylinder L, and may bepacked or not, as desired. The piston P, is considerably smaller thanthe plunger E, for technical reasons, as will appear.

The plunger E, may be accurately fitted within the tube D, andlubricated if preferred, but I find that with electro-magnetic enginesit is wholly unnecessary to encounter the friction resulting from closepacking and that a loose fit is all that is required. In the presentinstance a loose tit will secure a thin sheet of water between theplunger and the interior of the tube D, thereby providing all necessarylubrication.

The plunger E, is provided with recesses or ways 6, of any preferredshape, size, and number, although said recesses may be arranged as shownin Fig.2. IVith this construction each complete reciprocation will causethe plunger to raise water sufficient to fill the pump cylinder L, whichwater on the return stroke, will be expelled and driven upward throughthe passages 1, 2, 3, i, and into and through the cylinder D, passingfrom there through the valve f, and to the delivery pipe Gr, being in nowise impeded by the presence of the plunger E, which is passed by way ofthe recesses formed therein. The water, furtl1ermore,scrvcs to keep theentire surface cool.

The coils are desirably energized differently, that is to say, I securegood results from passing a continuous current through the central coilthereby continuously magnetizing the plunger E, and maintaining thereinconstant poles. The end coils 3, B, are desirably energized by currentswhich are changed in direction with each desired reciprocation of theplunger, and they may be arranged to be shifted automatically or byhand. A means of accomplishing this result is pointed out in acontemporaneous application, although the broad idea of shifting thecurrent at the generator or source by means controlled by the movementof the pump plunger, is covered by Patent No. 461,294, granted to meOctober 13, 1891.

Although I have only shown one complete structure in connection with theforegoing dcscription, it must be understood that the invention may beembodied in a variety of forms, in which the liquid being pumped isforced through passages provided in the electro-magnetic engine, sothat,WhileI have illusrated what I believe to be the best and mostpractical fornnl wish it to be understood that the invention is notlimited thereto.

llaving described my invention, What I claim, and desire to secure byLetters Patent,

1. A reciprocating electro-magnetic pumping engine comprising motorcoils, a magnetic plunger adapted to be reciprocated therethrough, apump actuated by said plunger, and passages extending from the pump andthrough the electric engine and in proximity to the motor coils.

2. A reciprocating electro-magnetic pumping engine comprising electricmotor coils, a magnetic plunger adapted to be reciprocated therethrough,a pump actuated by said plunger, and connections between the pump andthe electric engine whereby the pumped liquid is passed through theengine.

3. A reciprocating electromagnetic pumping engine comprising electricmotor coils, a magnetic plunger adapted to be reciprocated therethrough,and a pump piston actuated directly thereby, the mass or weight of themagnetic plunger being greater than that of the pump piston.

41. A reciprocating electro-magnetic pumping engine comprising electricmotor coils, a magnetic plunger adapted to be reciprocated therethrough,a pump actuated by said plunger, and connections between the pump andthe interior of the motor coils whereby the pumped liquid is passedtherethrough before reaching the eduction pipe.

5. A reciprocating electromagnetic pumping engine comprising motorcoils, a magnetic plunger adapted to be reciprocated therethrough undervariations of current in the coils, a pump and mechanical connectionsbetween the piston thereof and the plunger of the reciprocating engine,and ports and passages connecting the pump with the interior of. theengine.

6. A reciprocating electromagnetic pumping engine comprising electricmotor coils, a magnetic plunger adapted to be reciprocatedtheret-hrough, said plunger being formed With longitudinal passages, apump actuated by said plunger, and passages extending between the pumpand the interior of the motor coils whereby the pumped liquid is passedtherethrough and through the passages in the plunger before reaching theeduction pipe.

7. An electro magnetic pumping engine STEPHEN J ANNUS.

